Twisting spindles with flyer for cabled yarns



March 3, 1959 w. LENK 2,875,572

TWISTING SPfNDLES WITH FLYER FOR CABLED YARNS Filed Sept. 19, 1955 2 Sheets-Sheet l March 3, 1959 w. [,ENK 2,875,572

I TWISTING SPINDLES WITH FLYEB. FOR CABLED YARNS Filed Sept. 19, 1955 2 Sheets-Sheet 2 United States Patent TWISTING SPINDLES WITH FLYER FOR CABLED YARN'S Walter Lenk, Remscheid-Lennep, Germany, assignor to Barmer Maschinenfabrik A. G., Wuppertal-Elberfeld,

This invention relates to spinning machinery and more especially to the twisting spindles forming an integral part of many twisting frames.

It is concerned more particularly with improvements of the kind of twisting spindles provided with a flyer kept rotating by the yarn in the twisting operation and mounted above the calender reel, more especially when producing cabled yarn, e. g., cord yarn.

It is an object of this invention to improve this type of spinning machinery in this sense that a more uniform cabled yarn can be produced in which the distribution of the spindle threads remains uniform throughout the production of the yarn whereby a cabled product of equal strength throughout the twisted yarn is obtained.

In twisting spindles for cabled yarn hitherto in use, a flyer with an eye at its tip revolving beyond the bobbin diameter facilitates the withdrawal of the single threads about to be twisted, which may already have undergone a pretwisting operation and, owing to the angular position produced by its lag tends to create variations of the tensional effect exerted on the threads. During these operations, more especially when strong cabled yarns are produced, and quite particularly when using tall bobbins, the threads are likely to be withdrawn one over the head of the one preceding or succeeding it, so that a non-uniform twisting of the threads causing an equally non-uniform strength of the yarn ensues. If the bobbins are particularly tall, the threads at the foot of the bobbin are likely to override the threads above them, the twisting becomes irregular and a finished product of varying strength results.

All these irregularities are avoided in accordance with this invention by means of an additional operation which caused the folded threads, which had been withdrawn one ahead of the one following it, to be separated once more before the twisted yarn reaches the spindle.

In order to obtain this, I prefer providing two such fiyers and to mount on each of them a guiding and separating member which protrudes into the course of the threads between the eye of the flyer and the thread entrance into the central conduit of the spindle. This guiding member is formed with deflecting faces, edges or the like which are so arranged as to securely guide the separate threads towards an additional separation.

In the drawing affixed to this specification and forming part thereof, an embodiment of a guiding device according to this invention is illustrated diagrammatically by way of example.

In the drawings:

Fig. 1 is a side elevation of a twisting spindle mounted in the frame and a flyer mounted on said spindle for revolution with a guiding and separating device fixed to said flyer.

Figs. 2 and 3 are a front view and a side view, respec tively, of the guiding and separating member, while Fig. 4 shows a means of fixing said member to the flyer.

Fig. 5 is a plan view of a device according to this invention.

Referring to the drawing, 1 is a twisting frame spindle, and 2 is the spindle bearing, 3 is the flyer and 4 is the eye at the free end of the flyer. 5 is the guide member fixed to the flyer wire in the manner shown in Figs. 1 and 4. The guide member is formed in this instance of a bow-shaped steel wire with a highly polished hardchromium surface extending in opposite directions from the normal course 9 of the threads and forcing the single threads to be supported by one or the other of the guiding surfaces 6 and 7, respectively after having passed around the top surface 8 of the device. The three threads 13, 14 and 15 shown in the drawing as gliding on the how 8, are separated from each other, the threads 13 and 14 sliding onto their respective guiding and separating surfaces 7 and 6.

Obviously, instead of the convex bow surface 8 a concave guiding surface, similar to 6 and 7, may be provided. Instead of concave or convex surfaces, straight guide surfaces may be provided, if the distance between the thread guiding eye 4 and the entrance 1 of the spindle conduit is sufficiently small as compared with the distance between the normal course 9 of the thread and the three surfaces of the guiding device, to prevent a single thread from crossing the course of a neighbouring thread.

The guiding device 5 can be fixed for instance for adjustment on the flyer 3 by means of his arms 10 which are held in position by a clamping plate 11 and set screw 12.

The wire guide 5 might of course be replaced by a plate which might be formed with three guide faces which might be covered with porcelain, glass or other wear-resisting artificial matter. The number of guide faces may be varied according to the number of threads to be guided.

I wish it to be understood that I do not desire to be limited to the details shown on the drawing and described in the specification, for obvious modifications are bound to occur to a person skilled in the art.

I claim:

1. In double or multiple twist spindle apparatus for twisting yarn including a bobbin, at least one rotary flyer radially extending from the axis of the bobbin, an eye at the end of each flyer, and a hollow spindle traversing the bobbin, the improvement which comprises a thread guiding and separating member mounted on each flyer, said member including multiple faces angularly displaced relative to one another, and adapted to separate mutually displaced yarn components derived from a sole unwinding point on the bobbin, after passage through said eye, for orderly delivery to the twist spindle.

2. In double or multiple twist spindle apparatus according to claim 1, the thread guiding and separating member comprising a bow shaped member including two oppositely curved lateral portions, and a roof portion connecting said lateral portions, said roof and said lateral portions defining three guide surfaces for the yarn components to be separated for orderly rearrangement thereof.

3. In double or multiple twist spindle apparatus according to claim 1, the thread guiding and separating member comprising means for radially displacing it on the rotary flyer.

References Cited in the file of this patent UNITED STATES PATENTS 

